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Nov 14, 2024 | 
link.aps.org | Beverley McKeon |Eric Lauga |Brad Rubin |Arezoo M. Ardekani
It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.0 International license. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author(s) and the published article's title, journal citation, and DOI are maintained. Please note that some figures may have been included with permission from other third parties.
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Sep 19, 2024 | 
link.aps.org | Pyae Hein Htet |Debasish Das |Eric Lauga
Flagellated bacteria are hydrodynamically attracted to rigid walls, yet past work shows a “hovering” state where they swim stably at a finite height above surfaces. We use numerics and theory to reveal the physical origin of hovering. Simulations first show that hovering requires an elongated cell body and results from a tilt away from the wall. Theoretical models then identify two essential asymmetries: the response of width-asymmetric cells to active flows created by length-asymmetric cells.
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Sep 8, 2024 | 
biorxiv.org | Nikhil Desai |Eric Lauga
AbstractThe paranasal sinuses are a group of hollow spaces within the human skull, surrounding the nose. They are lined with an epithelium that contains mucus-producing cells and tiny hairlike active appendages called cilia. The cilia beat constantly to sweep mucus out of the sinus into the nasal cavity, thus maintaining a clean mucus layer within the sinuses.
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Sep 4, 2024 | 
biorxiv.org | Eric Lauga |Maria Tatulea-Codrean
AbstractNumerous studies have explored the link between bacterial swimming and the number of flagella, a distinguishing feature of motile multiflagellated bacteria. We revisit this open question using augmented slender-body theory simulations, in which we resolve the full hydrodynamic interactions within a bundle of helical filaments rotating and translating in synchrony.
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Aug 5, 2024 | 
link.aps.org | George T Fortune |Wilberforce Road |Eric Lauga |Raymond E. Goldstein
The humble Petri dish is perhaps the simplest setting in which to examine the locomotion of swimming organisms, particularly those whose body size is tens of microns to millimeters. The fluid layer in such a container has a bottom no-slip surface and a stress-free upper boundary. It is of fundamental interest to understand the flow fields produced by the elementary and composite singularities of Stokes flow in this geometry.
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Jul 25, 2024 | 
journals.plos.org | Nikhil Desai |Weida Liao |Eric Lauga
Loading metrics Open Access Peer-reviewedResearch Article Citation: Desai N, Liao W, Lauga E (2024) Natural convection in the cytoplasm: Theoretical predictions of buoyancy-driven flows inside a cell. PLoS ONE 19(7): e0307765. https://doi.org/10.1371/journal.pone.0307765Editor: Xin Yong, State University of New York at Binghamton: Binghamton University, UNITED STATES OF AMERICAReceived: December 1, 2023; Accepted: July 8, 2024; Published: July 25, 2024Copyright: © 2024 Desai et al.
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Feb 26, 2024 | 
nature.com | Elena Erben |Weida Liao |Antonio Minopoli |Nicola Maghelli |Eric Lauga
AbstractTechniques for high-definition micromanipulations, such as optical tweezers, hold substantial interest across a wide range of disciplines. However, their applicability remains constrained by material properties and laser exposure. And while microfluidic manipulations have been suggested as an alternative, their inherent capabilities are limited and further hindered by practical challenges of implementation and control.
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Feb 13, 2024 | 
biorxiv.org | Eric Lauga |Raymond E. Goldstein |George T Fortune
AbstractThe humble Petri dish is perhaps the simplest setting in which to examine the locomotion of swimming organisms, particularly those whose body size is tens of microns to millimetres. The fluid layer in such a container has a bottom no-slip surface and a stress-free upper boundary. It is of fundamental interest to understand the flow fields produced by the elementary and composite singularities of Stokes flow in this geometry.
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Jan 31, 2024 | 
link.aps.org | Eric Lauga |Beverley McKeon
DOI:https://doi.org/10.1103/PhysRevFluids.9.010001Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. ©2024 American Physical Society
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Dec 7, 2023 | 
biorxiv.org | Albane Théry |Eric Lauga |Alexander Chamolly
AbstractBiased locomotion is a common feature of microorganisms, but little is known about its impact on self-organisation. Inspired by recent experiments showing a transition to large-scale flows, we study theoretically the dynamics of magnetotactic bacteria confined to a drop. We reveal two symmetry-breaking mechanisms (one local chiral and one global achiral) leading to self-organisation into global vortices and a net torque exerted on the drop.
